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ThinkMind // International Journal On Advances in Telecommunications, volume 4, numbers 3 and 4, 2011 // View article tele_v4_n34_2011_5


An Effective Usage of Transmitted Directivity Information for Target Position Estimation Algorithm

Authors:
Hiroyuki Hatano
Tomoharu Mizutani
Yoshihiko Kuwahara

Keywords: position estimation; localization; directivity of array; sensor network; radar network

Abstract:
We consider localization systems for targets because information of the targets position, such as human, cars, dangerous objects, is very meaningful. Especially, we focus on the estimation of targets that exist in near wide area. In order to cover the wide area, the system, which has multiple networked ranging sensors, is useful. Such networked systems are often called as radar network systems or sensor network. The straight arrangement of the sensors is very useful because of easy setting and installing. Previously, receivers arranged in a straight line would generate a large positioning error in the same direction of the line, that is horizontal direction. In this paper, for reduction of this error, we propose a novel estimation algorithm using the directivity information of the transmitter. The proposed system has a electrical directional antenna in a transmitter. So the transmitter can emit signals to intended directions. In this paper, the error characteristic, which must be solved, is introduced firstly. Then, the proposed algorithm is presented theoretically. Finally, through the results of the computer simulations, the examples of the error reduction are demonstrated under various situations such as different target positions or type of sensors. The obtained results indicate the estimation characteristics that our proposal achieves the some reduction of the horizontal error even the sensors are arranged in a straight line.

Pages: 264 to 275

Copyright: Copyright (c) to authors, 2011. Used with permission.

Publication date: April 30, 2012

Published in: journal

ISSN: 1942-2601

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